Replace special IC builtins and stubs in the map's cache by codestubs.

src/type-info.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 287 matching lines @@
   return Handle<Map>::cast(GetInfo(prop->key()->LiteralFeedbackId()));
 }
 
 
 bool TypeFeedbackOracle::LoadIsBuiltin(Property* expr, Builtins::Name id) {
   return *GetInfo(expr->PropertyFeedbackId()) ==
       isolate_->builtins()->builtin(id);
 }
 
 
+bool TypeFeedbackOracle::LoadIsStub(Property* expr, ICStub* stub) {
+  Handle<Object> object = GetInfo(expr->PropertyFeedbackId());
+  if (!object->IsCode()) return false;
+  Handle<Code> code = Handle<Code>::cast(object);
+  if (!code->is_load_stub()) return false;
+  return stub->Describes(*code);
+}
+
+
 static TypeInfo TypeFromCompareType(CompareIC::State state) {
   switch (state) {
     case CompareIC::UNINITIALIZED:
       // Uninitialized means never executed.
       return TypeInfo::Uninitialized();
     case CompareIC::SMI:
       return TypeInfo::Smi();
     case CompareIC::HEAP_NUMBER:
       return TypeInfo::Number();
     case CompareIC::SYMBOL:
@@ skipping 386 matching lines @@
   USE(maybe_result);
 #ifdef DEBUG
   Object* result = NULL;
   // Dictionary has been allocated with sufficient size for all elements.
   ASSERT(maybe_result->ToObject(&result));
   ASSERT(*dictionary_ == result);
 #endif
 }
 
 } }  // namespace v8::internal